2181750 Self-Aligning Plain Bearing

Comprehensive specifications and application details for: 2181750 Self-Aligning Plain Bearing.

Summary

Explore detailed summary information for bearing: 2181750. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: 2181750
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-00-903-9979
Item Name Code: 13208
Federal Item Identification Guide: A045A0
Assigment Date: 06/15/1966

A detachable assembly in or on which a journal, gudgeon, pivot, or the like moves. It is used to carry a load and to reduce sliding friction. It does not employ rolling elements. The item consists of a bored precision ground ball (or spherical plain bearing) around which an outer ring is fitted. The assembly may be either separable or nonseparable. Excludes:bearing, plain, rod end and bearing, plain, spherical.

50.0 rockwell c nominal overall hardness rating, 0.2500 inches minimum and 0.2505 inches maximum bore diameter, 0.7769 inches minimum and 0.7774 inches maximum outer member outside diameter, steel corrosion resisting overall material, 0.4950 inches minimum and 0.5000 inches maximum inner member width

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-00-903-9979 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter: 0.2500 inches minimum and 0.2505 inches maximum
Hardness Rating: 50.0 rockwell c nominal overall
Inner Member Width: 0.4950 inches minimum and 0.5000 inches maximum
Material: steel corrosion resisting overall
Outer Member Outside Diameter: 0.7769 inches minimum and 0.7774 inches maximum
Outer Member Width: 0.3870 inches minimum and 0.3920 inches maximum
Style Designator: without insert or liner
Surface Treatment: chromium inner member

Replaces

The NSN 3120-00-903-9979 is used in place of the following discontinued or alternate items:

NSN	Name	Date
3120-01-137-5750	No Name Available	08/01/1984

Frequently Asked Questions

Find quick answers to common questions about bearing: 2181750. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-00-903-9979?: The FSCG of the NSN 3120-00-903-9979 is 3120

Does the NSN 3120-00-903-9979 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-00-903-9979 require demilitarization?: Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 3120-00-903-9979 contain precious materials?: Precious metal content is unknown

Does NSN 3120-00-903-9979 contain hazardous materials?: Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.